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2. Transparency (projection) - Wikipedia

   en.wikipedia.org/wiki/Transparency_(projection)

   Overhead projector in operation, with a transparency being flashed. A transparency, also known variously as a viewfoil or foil (from the French word "feuille" or sheet), or viewgraph, is a thin sheet of transparent flexible material, typically polyester (historically cellulose acetate), onto which figures can be drawn.

3. BoPET - Wikipedia

   en.wikipedia.org/wiki/BoPET

   Metallized boPET film, 32 layers of ~14 μm thickness each. BoPET (biaxially oriented polyethylene terephthalate) is a polyester film made from stretched polyethylene terephthalate (PET) and is used for its high tensile strength, [1] chemical stability, [1] dimensional stability, [2] transparency [1] reflectivity, and electrical insulation. [1]

4. Plastic film - Wikipedia

   en.wikipedia.org/wiki/Plastic_film

   Film strip (photographic film) 6 mil polyethylene plastic sheet as vapor barrier in construction Confectionery packaging made of PLA-blend bio-flex bioplastic Shrink-wrapped OH-58 Kiowa helicopters to be shipped. Plastic film is a thin continuous polymeric material. Thicker plastic material is often called a "sheet".

5. List of photographic films - Wikipedia

   en.wikipedia.org/wiki/List_of_photographic_films

   Ortho-panchromatic emulsion from 1950s re-introduced as a modern cascade coating for ADOX (Fotoimpex) in 2013. Following test coating at Marly, sheet film was re-introduced in 2018 and 135 format in 2020. 120 film in 2023. [8] [9] [10] Germany: 135–36, 120, Sheet film

6. Film base - Wikipedia

   en.wikipedia.org/wiki/Film_base

   Acetate can also be spliced with film cement, while polyester can only be spliced with tape or an ultrasonic splicer, so polyester is hard to edit. Acetate film does not burn under intense heat, but rather melts, causing a bubbling burn-out effect — this can be seen simulated in films such as Persona (1966), Two-Lane Blacktop (1971) , The ...

7. Film stock - Wikipedia

   en.wikipedia.org/wiki/Film_stock

   A piece of film consists of a light-sensitive emulsion applied to a tough, transparent base, sometimes attached to anti-halation backing or "rem-jet" layer (now only on camera films). Originally the highly flammable cellulose nitrate was used. In the 1930s, film manufacturers introduced "safety film" with a cellulose triacetate plastic base ...